Piece of Spire Lowered Onto Tower's Roof

New Images of One World Trade Center Released

The first piece of the spire for One World Trade Center is lowered by construction cranes into position on the roof of the tower, Jan. 15, 2013 in New York. When the spire is completed, the building will top off at 1776 feet, making it the tallest building in North America.

Mark Lennihan/AP Photo

New Images of One World Trade Center Released

The first piece of the spire for One World Trade Center is lowered by construction cranes into position on the roof of the tower, Jan. 15, 2013 in New York. When the spire is completed, the building will top off at 1776 feet, making it the tallest building in North America.

Mark Lennihan/AP Photo

New Images of One World Trade Center Released

The first piece of the spire for One World Trade Center is lowered by construction cranes and guided by ironworkers into position on the roof of the tower, Jan. 15, 2013 in New York. When the spire is completed, the building will top off at 1776 feet, making it the tallest building in North America.

Mark Lennihan/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows an evening view of One World Trade Center, from the W New York Downtown Hotel. The new images show a spire that is planned to rise to a symbolic 1,776 feet.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows a night view of One World Trade Center from the W New York Downtown Hotel. When it is completed, the tower will surpass the Willis Tower in Chicago as the tallest building in the United States.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows an evening view of One World Trade Center, center, from Brooklyn, N.Y. Once completed, the tower's height will make it the tallest all-office building in the world, surpassing Taipei 101 in Taiwan.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows a street view of the main entrance of One World Trade Center.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows an evening view of a partially lit One World Trade Center from Brooklyn, N.Y.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows a view of One World Trade Center, as seen from 8 Spruce St., the tallest residential building in the United States. Eight Spruce St.'s 870-foot height will be more than doubled by the height of One World Trade Center, which is expected to reach 1,776 feet.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows a view of One World Trade Center as it would appear lit up at night from Brooklyn, N.Y.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows the lobby of One World Trade Center. Once completed, the lobby will be the first of the tower's 104 stories.

Durst Organization/Port Authority of NY & NJ/AP Photo

World Trade Center Becomes Tallest Building in NYC

This computer-generated, updated artist rendering shows a view of One World Trade Center as seen from Memorial Plaza, where the original Twin Towers once stood.

Durst Organization/Port Authority of NY & NJ/AP

World Trade Center Becomes Tallest Building in NYC

Ironworkers Jim Brady, left, and Billy Geoghan release a steel cable after connecting a steel beam between two columns at the top of One World Trade Center to make it New York City's tallest skyscraper, April 30, 2012 in New York.

Mark Lennihan/AP Photo

World Trade Center Becomes Tallest Building in NYC

Ironworker Jim Brady climbs a column at the top of One World Trade Center to make it New York City's tallest skyscraper, April 30, 2012 in New York.

Mark Lennihan/AP Photo

World Trade Center Becomes Tallest Building in NYC

Ironworkers Adam Cross, left, and Steven Cross connect a steel beam between two columns at the top of One World Trade Center to make it New York City's tallest skyscraper, April 30, 2012 in New York.

Mark Lennihan/AP Photo

World Trade Center to Become Tallest Building in NYC

One World Trade Center has become New York City's tallest skyscraper today as workers erect steel columns that makes the unfinished skeleton a little over 1,250 feet high.

ABC News

World Trade Center to Become Tallest Building in NYC

The lower Manhattan skyline shows One World Trade Center, April 27, 2012 in New York. By Monday April 30, 2012 the rising steel frame of One World Trade Center is expected to become the tallest building in New York City and in the Western Hemisphere.

Don Emmert/AFP/Getty Images

World Trade Center to Become Tallest Building in NYC

One World Trade Center rises above the Manhattan skyline in New York, April 17, 2012.

Mark Lennihan/AP Photo

World Trade Center to Become Tallest Building in NYC

The New York City Skyline is changing forever as the Freedom Tower reaches heights taller than the Empire State Building, seen here at sunset April 29, 2012, from Brooklyn, NY.

Tiffany Hagler-Geard/ABC NEWS

World Trade Center to Become Tallest Building in NYC

"Seven days a week..." The tower has taken 6 years to get to this point, growing at a rate of a floor a week. As the tower nears the day that it can reclaim the title of tallest building in New York, construction continues at the World Trade Center site around the clock?24 hours a day/7 days a week?as long as the weather cooperates.

Lana Zak/ABC

World Trade Center to Become Tallest Building in NYC

One World Trade Center is due to reach and surpass the height of the Empire State Building, to become New York City's tallest building.

Jeffrey Schneider/ABC

World Trade Center to Become Tallest Building in NYC

The view from the top of the World Trade Center construction area is shown. The tower still isn't as high as the antenna that sits on the Empire State Building.

Jeffrey Schneider/ABC

World Trade Center to Become Tallest Building in NYC

With 37,000 tons of steel and a 186-foot fortified base, when complete the tower will stand proudly at 1,776 feet, about 49 feet taller than the original North Tower.

Lana Zak/ABC

World Trade Center to Become Tallest Building in NYC

"Nine hundred workers get hungry." There was once a Subway sandwich shop that was hoisted up as the tower expanded. But as the tower rises, it becomes more narrow, which means, according to the Port Authority, that there isn't room for the restaurant anymore. These days workers pack their own lunch--or in true New York style--order delivery.

Lana Zak/ABC

World Trade Center to Become Tallest Building in NYC

"If the stairway to heaven is broken, use this." Elevators can only take you to the 90th floor at this point in the construction at One World Trade Center. If you want to go any higher, there are ladders to take you more than 1,200 feet into the air. For the final ladder to the crane, you had better grip firmly because the ladder turns as the crane moves.

Lana Zak/ABC

World Trade Center to Become Tallest Building in NYC

"You know it's a good view when even the guys who work here are taking out their cameras..." From the 84th floor, lower Manhattan looks like a monopoly board with matchbox cars, while workers at the top enjoy views of all five boroughs, the Hudson and East Rivers, and the always awe-inspiring Statue of Liberty.

Lana Zak/ABC

World Trade Center to Become Tallest Building in NYC

"I got pudding cups!" Bottles of water, Snickers, Twix, and more are wheeled around for purchase for those needing an extra boost.

Lana Zak/ABC

World Trade Center to Become Tallest Building in NYC

Can you imagine swinging around and picking up 20,000 pounds out of the street in a narrow alleyway? The crane operators seem like maestros of the air, conducting a sort of construction symphony. As the tower rises, the cranes are designed to climb up with the building.

Lana Zak/ABC

World Trade Center to Become Tallest Building in NYC

The memory of the victims of 9-11 is woven into the very frame of the building. We spotted this message, written on a support beam, a tribute to fallen Firefighter Raymond Murphy, Ladder Co. 16., who died when the original buildings went down, Sept. 11, 2001.